Hi All I have the following:

<EditForm Model=@engineer FormName="Upsert" OnValidSubmit="SaveEngineer">
<div class="form-group row p-2">
    <input type="hidden" @bind-value="engineer.id" />
    <div class="col-md-6">
        <input type="text"  class="form-control" placeholder="Name" @bind-value="engineer.name" />
    </div>
    <div class="col-md-6">
        <input type="text" class="form-control" placeholder="Country" @bind-value="engineer.country" />
    </div>
</div>
<div class="form-group row p-2">
    <div class="col-md-6">
        <input type="text" class="form-control" placeholder="Speciality" @bind-value="engineer.speciality" />
    </div>
</div>
<div class="form-group row p-2">
    <div class="text-center">
        <button type="submit" class="btn btn-primary">Save</button>
    </div>
</div>

and in my code behind I have:

 public Engineer engineer = new Engineer();

private async Task SaveEngineer()
{
    await engineerService.UpsertEngineer(engineer);
    NavManager.NavigateTo("/");
}

After placing values in the input fields and pressing the Save button, engineer values are all null.